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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2019, Vol. 40 ›› Issue (7): 422695-422695.doi: 10.7527/S1000-6893.2019.22695

• Material Engineering and Mechanical Manufacturing • Previous Articles     Next Articles

Lamb waves health monitoring technology for metal stiffened plate based on compressive sensing

JIAO Jingpin, LI Haiping, ZHAI Shuncheng, HE Cunfu, WU Bin   

  1. College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China
  • Received:2018-09-19 Revised:2018-10-10 Online:2019-07-15 Published:2019-01-24
  • Supported by:
    National Key Research and Development Program of China (2016YFF0203002);National Natural Science Foundation of China (11572010, 11772013)

Abstract: To meet the needs of safety assessment of large and complex plate structures, a Lamb wave health monitoring technique for stiffened metal plate structures based on compressed sensing is developed. The dispersion characteristics of Lamb waves in stiffened panel structures are recovered from a small amount of testing data obtained from sparse array using compressed sensing technology. To realize large-scale defect detection imaging in stiffened panel structures, a new method of sparse array Lamb wave composite imaging combining cosine similarity with Pearson similarity is proposed. The experimental results show compressed sensing technology can recover the frequency-wavenumber relation of Lamb waves in stiffened plates. And the Lamb wave composite imaging method can detect and locate single and multiple defects in stiffened panels. Research work provides a feasible technical solution for detecting damage of complex plate structure.

Key words: stiffened metal plate, Lamb waves, health monitoring, dispersion characteristics, compressive sensing, sparse array

CLC Number: